Liquid fuel vapor burner



INVENTOR C1155 757? /Z. Hon- 8% ATTORNEYS Aug. 1, 1933. c. A. HOFF LIQUID FUEL VAPOR BURNER Filed Jan.

Patented Aug. 1, 1 9.33:

FATE

1920,933" I mourn" FUEL. VAPOR URN R w en t-Chester A. Hoff, Akron, Ohio, assignor to The ;.Akron Lamp Company, Akron, Ohio, a Corpo- -ration of Ohio Application January 11, 1930.

Serial No. 420,059

I 6 Claims. (01. 67- 1) The present invention relates to burner con structions. and J particularly to "burners for the combustion of liquid fuel .in vapor or gaseous form. Devices of thisgeneral nature are usually intended for the combustion of a liquid fuel such as gasoline,v which W111 vaporize underproper conditions, the fuel being supplied from a reser voir in which it isheld under airpressure, being forced'by the pressure into a vaporizing tube, from which it fisc'onductedto the burners where it is commingled, with air 'to form the, proper combustible mixture. a p v TheinventiOn is specifically shownand described as. applied to a vapor lamp, although it may be applied to other devices of-a similar character. The objectof the invention is to provide 7 a simple and eifective means by which the lamp may be ignited. immediately without requiring pre-heating to vaporize the fuel. 7

The present invention is in the nature of an improvement over and upon the mechanism shown and described, in. my prior application Serial No..335,006, filed January 25, 1929, and

While it operates upon the same principles as .25

my prior device, certain specific improvements are made in the present invention which give a superior action. I r Although theapparatusof myprior application is operative, the improvements which have been shown and are claimed herein, simplify the construction and give better results. "Specifically, thearrangement shown herein will not get out .of order andis more easily cleaned than the former construction.

It is also an object of the invention to, combine with the starting or lighting. features in the present type of burner, a large vaporizer tube, whichis more eliicient in action. than the smaller tubes used in .prior'construction. Y The invention is intended for burners of various types such as used in connectionnot only with lamps, but in heaters, stoves, sadirons, and all other gasoline appliances. t will'be under stood that while the description andfdrawing arede'tailed and show" a lamp, the invention is not limited to details referred to herein but may be extended arid improved; Y I

, In the drawing in which the best known or preferred form of the invention is shown and described; c Figure l is a side elevation of a lamp embodying the features ofthe invent-ion;

Figure 2 is a vertical central section through the burner'and the control mechanism;

In the drawing,

'a port 33 which communicates by a minute pas- Figure 3 is a vertical section on the line .3--3 of Figure 2;.and 1 V I I Figure' i is a horizontal section on the line 44-4 of Figure 2. J

i '1 is the hollowbase or reser- .voir of the lamp which is. adapted to hold'the liquid fuel under pressure of air in the upper part of the base, the air being admitted through 'a valved opening 2 in the upper part of the base, a small. hand pump being usually provided for this purpose. The baseis. surmounted by a hollow pillar 3 tothe upper end of which is se-" cured thelvalve' mechanism supported and contained withinavalvehousing 5. The fuelfeed pipe 6forthe liquid fuel extends from thehousing to a point close to the bottom. of theflreservoir.

The pipe 6 communicates with. and conducts the liquid fuel into a mixing chamber 8 located in the centerof the housing 5 from which ex- 7 tends the lateral passage 9 which-is formed in a removable screw-threaded plug 10, set intothe housing. Located in the. mixing chamber 8 is the double-faced valve 12 which is carried upon. the end of a screw-threaded shaft 14 which extends through the passage 9 and is in engagement with the screw-threaded bore 15 atthe rear. of the passage .9. 'The'shaftl i extends out- I wardly of the plugfand is provided with an oper- 'qating handle 16. a cap nut 18 and compressible 35 the casing and the parts carried by the plug ar i accessible for cleaning.

Cut into the surface of the shaftl4 along the screw threads is the passage 24 which conducts. the. fuel from thepassage 9 to achamber 25 within the plug from whence extends the diagonal passage 26 whichopens on the surface of the flange 20 through the gasket 22. In the surface of the housing'and communicating with the passage 26 isthe circular channel 28 from which extends the lateral passage 29 leading to the chamber 31at the baselof the vaporizer tube.

Located in the casing opposite the plug 10 is sageway 3a with a passage 35 extending from the underside of'the housing, through which compressed air from the interior of the reservoir is conducted to the chamber 8. The passage 34 of making the construction clear, is in practice approximatelyxOlS of an inch in diameter, although its dimensions may be varied. The successful use of the device is dependent in some measure upon the size of this opening. On the headof the valve 12 is located thefine pin or needle 36 which enters the passage 34 and serves not only to break up the stream of air entering the' chamber but alsothe passage, a slight oficenter "position of the pin being advantageous I but not essential.

It will be observed that the valve 12 is move to close the air pipe'or the outlet selectively, and means carried by the valve and entering the air able between a valve seat formed at the mouth of the port 33 and a valve seat 37'at the mouth of thepassage 9 in which positions it'closes' the respective passages and is also adapted to be placed in an intermediate position in which both ports and passages are open. I p v When the lamp is'shut off the shaft is moved to its extreme right position, whereupon the valve 12 closes the passage 9. In starting, the'valve is moved to the intermediate position shown in the drawing; whereupon the" air under pressure flows through thepassages 34 and 35"and port 331 to the mixing" chamber 8 whereitmingles with the gasolinefiowing upward through the pipe 5. The air andgasolin'e together are 'carf ried through the passages '9 and 24 to 26 and thenceto the channel 28 and into the'bas e ofthe vaporizer tubeu The tortuous passage for the air and gasoline thoroughly'mlxes the two elements and gives a combustible combination thereof. From the tube 40 theyare'conducted to the burner 41 wherethey'can be ignited. ,The. mixture of air and gaswill burn'until the vaporizer tube is heated, whereupon the flame will diminj ish. At this point the operator moves the valve 12 over to the valve seat"30,'closing thepa'ssage of'air into thech'amber' with the result that the liquid fuelis' conducted directly to the vaporizer tube, at which pointit will be heated sufficiently to support combustion. I

The particular form of igniting apparatus is particularly'useful as it is easy to clean and ac ce'ssible. One advantage" over the prior construction referred tolies in the fact that the air passage 34 which'r'nust necessarily be very minute is'located' opposite the removable plug so that it can be cleaned, and the valve itself may be provided withthe cleaning pin 36. The plug itselfmay be easily disassembled and cleaned.

i The vaporizer tube iO which is inserted in the upper endof the valve housing jis'enlarged as shown for'the reception of a coil orroll of screen 42 whichsurr'ounds the valve pin 43, Aylight spiral or coil of wire 45 may'also be locatedfin the tube. The arrangement which has been shown effectively divides and breaks' upithe stream of gasoline so that it readily 'vaporizes. In addition, the increased area of the tube tends to device may be easily cleaned. I

The lower end of the valve pinis provided with the circular grooves 48 which mesh with the pinion 50 on thes'haft 51 as described and for the purposes set forth in the earlier application rereduce carbonization in the tube and theflwhole ferredto; 5 p H e m v p The advantages ofth'epre'sent invention may the mixing chamber, an outlet from the mixing chamber to the'burner and a single valve movable pipe and. cleaning the outlet therefrom.

2. In a vapor burner, the combination with a reservoir adaptedto hold liquid fuel under air pressure, a housing above the reservoir and having a chamber, a fuel pipe and an air pipe leading from the reservoir and discharging into the chamberya removable plug in the chamber, a valve carried byi the plug, a discharge passage fromthe chamber located in the plug, said valve being movable to close the air pipe and the dis- "charge passage selectively of the chamber."

" 3 In a vapor burner, the. combination with a reservoir adapted to hold liquid fuel under air pressure, a housing above thereservoir and having a chamber, a fuel pipe and'an air pipe leading fromthe reservoir and discharging into the chamber, aremovable plug in the chamber, a valve carried by-the plug, a discharge passage from the chamber located in the plug, said valve being movable to close the air pipe and the discharge passage selectively and having an interme'diate position in which both passages are open.

4.In a vapor burner,'the combination with a reservoir adapted to hold liquid fuel under air pressure, a housing above'thereservoir and having a chamber, a fuel pipe and an air pipe leading from the reservoir and discharging into the chamber, -a removable plug in the chamber, a valve carried by the plug, a pin carried by the valve and adapted to} enter the air pipe, a discharge passage from the chamber located in the plug, said valve being movable to close the air pipe and the discharge passage selectively. -51 Ina vapor burner, means for starting the burner comprising a mixing chamber for air and liquid fuel, a tortuous passage from the chamber to 1 the burner, .and means to admit air to the chamber comprising-a valve adapted to cooper ate with a capillary port in the wall of the chamber for the admission of air thereto and having a needle forent'ering the port.

6. In a vapor burner, a' reservoir for liquid fuel under air pressure, a valve housing having a chamber therein, conduits for liquid fuel and for air under pressure leading from the reservoir to the chamben'the'airconduit having a restrict-v ed openingin a wall of 'the'chamber, a removable plug in the opposite wall of the chamber, a tortuous passage in the plug leading to a burner, and a valve in the plug adapted in one position to close the air opening and in another position to close the" passageand in an intermediate position toopen both the opening and the passage.

' CHESTER A. I-IOFF. 

